mc68hc908gr16 Freescale Semiconductor, Inc, mc68hc908gr16 Datasheet - Page 55
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mc68hc908gr16
Manufacturer Part Number
mc68hc908gr16
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908GR16.pdf
(276 pages)
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3.8.2 ADC Data Register High and Data Register Low
3.8.2.1 Left Justified Mode
In left justified mode, the ADRH register holds the eight MSBs of the 10-bit result. The ADRL register holds
the two LSBs of the 10-bit result. All other bits read as 0. ADRH and ADRL are updated each time an ADC
single channel conversion completes. Reading ADRH latches the contents of ADRL until ADRL is read.
All subsequent results will be lost until the ADRH and ADRL reads are completed.
3.8.2.2 Right Justified Mode
In right justified mode, the ADRH register holds the two MSBs of the
10-bit result. All other bits read as 0. The ADRL register holds the eight LSBs of the 10-bit result. ADRH
and ADRL are updated each time an ADC single channel conversion completes. Reading ADRH latches
the contents of ADRL until ADRL is read. All subsequent results will be lost until the ADRH and ADRL
reads are completed.
Freescale Semiconductor
Address:
Address:
Address:
Address:
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Figure 3-5. ADC Data Register High (ADRH) and Low (ADRL)
Figure 3-6. ADC Data Register High (ADRH) and Low (ADRL)
$003D
$003E
$003D
$003E
Bit 7
AD9
AD1
Bit 7
AD7
0
= Unimplemented
= Unimplemented
AD8
AD0
AD6
6
6
0
MC68HC908GR16 Data Sheet, Rev. 5.0
AD7
AD5
5
0
5
0
Unaffected by reset
Unaffected by reset
Unaffected by reset
Unaffected by reset
AD6
AD4
4
0
4
0
AD5
AD3
3
0
3
0
AD4
AD2
2
0
2
0
AD3
AD9
AD1
1
0
1
ADRH
ADRH
ADRL
ADRL
Bit 0
AD2
Bit 0
AD8
AD0
0
I/O Registers
55
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